Tomasz Chmielewski wrote:
Thomas Glanzmann schrieb:300 Gbyte of used storage of several productive VMs with the following Operatings systems running: \begin{itemize} \item Red Hat Linux 32 and 64 Bit (Release 3, 4 and 5) \item SuSE Linux 32 and 64 Bit (SLES 9 and 10) \item Windows 2003 Std. Edition 32 Bit \item Windows 2003 Enterprise Edition 64 Bit \end{itemize} \begin{tabular}{r|r|r|l} blocksize & Deduplicated Data \\ \hline 128k & 29.9 G \\ 64k & 41.3 G \\ 32k & 59.2 G \\ 16k & 82 G \\ 8k & 112 G \\ \ Bottom line with 8 K blocksize you can get more than 33% of deduped data running a productive set of VMs.Did you just compare checksums,
I wouldn't rely on crc32: it is not a strong hash, Such deduplication can lead to various problems, including security ones.
or did you also compare the data "bit after bit" if the checksums matched?
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